Now in every other academic or pseudo-academic field this sort of corruption of the language is not tolerated.
As someone with a Masters in English and more than a few publications in literary journals, I call bullshit. For real.
First of all, language is infinitely corruptible by design. It fluctuates and changes all the time. Thinkst thou not so? Then a pox upon thee!
Second, there are a whole lot of dialects of English out there, each one of which corrupts the others to an extent. The inner-city homeboy and the Scottish Highlands goat herder are both speaking English -- an English that is incomprehensible to others, but still English.
The English you apparently suppose is being "corrupted" is what we typically call "Standard Written English." There is an entire cottage industry of grammar nit-pickers who would love to have us believe that English is some pure holy thing, rather than what it is: an unholy marriage between poorly-pronounced French and throat-clanging Saxon. The rules they have foisted upon us are self-contradictory, poorly considered, and often flat-out wrong.
Take for instance the rule against ending a sentence with a preposition. That "rule" dates from the 16th century. The reason for it? Some scholars aspired to make English as noble as Latin. They noticed that the words that make up "preposition" come from the Latin words pre (before) and ponere (to place). Obviously, if it's at the end of the sentence, it's not coming before anything, so it's a mistake.
The only problem with that "rule" is it's not true. People do this all the time. Same with split infinitives -- the only reason people think we shouldn't was because someone back in the day noticed that in Latin you can't split them. But you can in English, and so plenty of people do, including educated people.
Truth is, people make rules like this for reasons that have nothing to do with the language, but everything to do with power. They follow rules like those above because they hope, by doing so, to be perceived as smart and educated. But sub-communities are always creating their own words and reinventing their own grammar.
And I say let them.